>in a certain time period (say christmas) I will promote a doc in "christmas" keyword
You might check the QueryElevation component in SOLR. >or based on users interest I will boost a specific category of products. >or (I am not sure how can I do this one) I will boost docs that current >user's friends (source:facebook) purchased/used/... You can check https://cwiki.apache.org/confluence/display/MAHOUT/Recommender+Documentation apache mahout for this purpose. It's got recommendation engine that works pretty well. Thanx Pravesh -- View this message in context: http://lucene.472066.n3.nabble.com/boosting-and-relevancy-options-from-solr-extensibility-points-java-tp3149916p3395752.html Sent from the Solr - User mailing list archive at Nabble.com.